Bug Report - GNOME/Mutter Fractional Scaling

[Adonnen Dagnir]

Hello, all. I reported an issue to the gitlab 
(https://gitlab.freedesktop.org/spice/spice-gtk/-/issues/183), but I see 
the readme wants issues sent to the mailing list. I will summarize here:

VM viewers that use spice-gtk do not render properly when running under 
wayland with GNOME/Mutter's experimental fractional scaling enabled. 
Wayland windows are scaled by rendering at a higher-than-native 
resolution (I think 2 x (native res / scaling factor)) and then 
downscaled to native res. Spice-gtk reports the higher-than-native 
resolution to the VM client, which renders at said resolution. My screen 
width is *2256*, but with 125% fractional scaling, VMs report and render 
with width (2256 / 1.25) * 2**~*3606*.


Have a nice day.
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